The 1948 Palestinian exodus, also known as the Nakba (Arabic: النكبة‎, al-Nakbah, lit. "disaster", "catastrophe", or "cataclysm"), occurred when more than 700,000 Palestinian Arabs fled or were expelled from their homes, during the 1948 Palestine war. The term nakba also refers to the period of war itself and events affecting Palestinians from December 1947 to January 1949.

The very precise number of refugees is a matter of dispute but around 80 percent of the Arab inhabitants of what became Israel (50 percent of the Arab total of Mandatory Palestine) left or were expelled from their homes.